ecb-sbc-v2 / ecb-zp ctc timer configuration

Correct instructions on jumpering.

Source/HBIOS/hbios.asm

@@ -1086,13 +1086,15 @@ HB_CPU2:
 ;
 	; CTC USES 4 CONSECUTIVE VECTOR POSITIONS, ONE FOR
 	; EACH CHANNEL.  BELOW WE SET THE BASE VECTOR TO THE
-	; START OF THE IVT, SO THE FIRST FOUR ENTIRES OF THE
+	; START OF THE IVT, SO THE FIRST FOUR ENTRIES OF THE
 	; IVT CORRESPOND TO CTC CHANNELS A-D
 	LD	A,0
 	OUT	(CTCA),A		; SETUP CTC BASE INT VECTOR
 ;
 	; ASSUMING ECB-ZP WITH 4.9125MHz XTAL AND / 8 DIVIDER
-	; JUMPER X5 15-16, 9-11, X5 PIN 3 (PHI_X) TO X4 PIN 7 (CTC_TG2)
+	; JUMPER X5 15-16, 9-11
+	; JUMPER X5 PIN 3 (PHI_X) TO X4 PIN 7 (CTC_TG2)
+	; JUMPER X4 PIN 8 (CTC_ZC2) TO X4 PIN 9 (CTC_TG3)
 	; CONFIGURE CHANNEL D FOR 50HZ PERIODIC INTERRUPTS
 	; CTC CLK = 614,400Hz
 	; CTCD TIME CONSTANT = 48